Pumping system for oil burners



April 16, 35- c. A. MEZG-ER 1,998,020

PUMPING SYSTEM FOR OIL BURNERS Original Filed Oct. 24," 1932 8 F T J P77 11! 14 INVENTO ATTORNEY Patented Apr. 16, 1935 'PATENro F cg 1,998,029PUMPING SYSTEM FOR 011. commas ermit; August Mezger, .Brooklyn, N. r.

Application October 24, 1932, Serial No. 639,308 Renewed September 1'1,1934 4 Claims. (01,103-40) My invention relates to improvements insystems for circulatingfuel oil and other liquids, vapor and gases, anda device by means of which the circulation of "same is automaticallycon-- trolled; and the objects of my improvements are,

first, to provide a means for automatically opening the cycle of thecirculatingsystem by the pressure of the circulated medium and closingthe cycle of circulation by relieving the pressure 19 of same; second,to'provide a remote control of a storage tanksupply and a circulationsystemior the automatic operation of same; third,'to provide anautomatic means to prevent the siphoning oi iuel oil or other liquidsserved from a level above the circulating system through injury andleakage of same; fourth, to provide a means ,to automatically controlthe circulation or fuel oil or other liquidsserved from a storage tanksupply below the level of the circulating system.

and illustrated in the accompanying drawing in .by the burner 22, theremaining portion being which- Figure 1 is a sectional view of thecontrol device on the line I, 2, or Fig; 3, showing the valves closed;Fig. 2 is a similar view showing the valves open; Fig. 3 is a bottom endview of the control device; Fig. 4 is aside view of the control valve;

Fig. 5 is a top view of same; Fig. 6 is a side view oi the spring plugand adjusting screw; Fig. '7 is a top view-oi same; Fig. 8 is a view ofthe spring button; Fig. 9 is a 'side view of the valve spring; Fig. 10is an end view of same; Fig. 11 is an illustration of the circulatingsystem, showing storage tanks above and below the level of same.

Similar numerals refer to. similar parts throughout the views.

The chambered metal body ,I, the valve 2, the

coiled spring 3, the spring button 4, the threaded plug 5,-and thumbscrew 6, constitute the parts of the control device; the body I has theinlet chambers with threaded ports I and 8; the suction or dischargechamber with. threaded port 9;

the port III communicating between the chambers .'I and 9 has achamfered circumference to form a valve seat to engage in contact with achamiered circumference of the valve 2, which has a downwardly extendedhollow open ended stem II, with a port I2, adapted to engage with andslide within the cylindrical extension of the inlet chamber 8; thehollow stem of the valve 2, is also extended upwardly and has a smallhole I3, communicating with the slot I4, in the top of same; the upperstem of the valve 2, serves to form a guide for the spring '3,---whlchis adapted to hold the valve 2, in ,tensional contact with the valveseat of the port III, by means of the spring button 4, the threaded plug5, and the thumb screw 6, threaded into the plug,5. v v The controldevice described is adapted to form a part of the fuel oil circulatingsystem illustrated in Figure 11, and in which the conduit I5, leadingfrom the storage tank I 6, is connected to the threaded port I, of thecontrol device I-; 10 a T fitting I1, with a removable plug I8, isconnected to the suction or discharge port 9, andto the suction conduitI9, which leadsand is connected to theintake 29, of the circulating pump2| of the oil burner 22; from the relief valve and 15 discharge 23 ofthe circulating'pump 2|, the conduit 24,'is extended back tothe controldevice I, and connected to the threaded inlet port 8.

In'operation the circulating conduits I9 and 24 are first primed withfuel oil at the priming port 20 of plug I1, after which the same isclosed with the plug I8. v A portion 01 the circulated iuel oil isconsumed passed by the reliefvalve' on the burner to the. g dischargeport 23, under pressure of the cireulat- .ing pump 2|, and returnedthrough the conduit 24, to the control device I, where it enters the.chamber 3, of the same forcing the valve 2, oil

of the seat of the port Ill, against the tension of so the spring 3, asshown in Figure 2, thus holding open the tank inlet and at the same'time uncovering the port I2, of the valve stem II, to permit thereturned oil to enter the chambers I, and 9,

to be circulated with the fuel oil from the storage, 35 tank, and duringthe operation of the circulating pump 2 I, open communication will bemaintained between the chambers I, 8, and 9, by the pressure of thereturned oil in the chamber 8, oi the control device I; should thecirculating system be injured so asto cause a leak in same or the oper--ation of the circulating pump be discontinued the pressure of the oilin the chamber ,8, of thecontrol device I, will be relieved and thetension of the springjpwill seat the valve 2, and cover 45 the port I2,the'trapped oil in the chamber 3, es-- 'caping through the small holeI3, to permit the valve 2 tojbe firmly seated thus closing communi-.-'cation between the storage tank and the circulating system.- 7 50 In thecontrol device of the circulating system described, the tension of thespring 3 may. be a'd-" 'justed by the regulating screw 6, and the port 1a. f

shown connected to the tank inlet conduit I3, so

the valve 2 will open in the direction of the II,

of the oil from the tank It, and in which case the tension of the spring3 is adjusted to overcome the atmospheric pressure; the inlet conduit I!may, however, be connected to the port I, and the port I connected tothe 'l' fltting I! of the conduit is, so that the valve 2 will openagainst the flow of the oil from the tank It, in which case the tensionof the spring 3, would be only that required for the seating 01 thevalve 2, to close the port 10; thetrapped oil inthe chamber I, be-- ingallowed to escape into the chamber I, through a small hole in the valvestem ll, instead of as previously described.

The circulating system and control device herein described for use withfuel oil may also be used for the controlled circulation oi! otherliquids, also for vapor and gases without departing from the principleof my-invention the scope of which is intended to cover the use forsame.

Having described my invention, what I claim as new, and desire to secureby Letters Patent is- 1. A control device for fluid pumping systemscomprising a valve bodyproviding an inlet chamher, an outlet chamber, areturn chamber, and a separate fluid connection to each of said,chambers, a port in the valve body connecting the inlet and the outletchambers,-a valve adapted to seat across said port, said valvehaving anextension slidable in the return chamber and provided with a passagewayconnecting the inlet and the return chambers, and a resilient meansacting to hold the valve on its seat and to close said passagewayagainst the wall of the return chamber, the pressure in the returnchamber acting to move the valve from its seat to open communicationbetween the inlet and the outlet chambers through said port, and betweensaid return and inlet chambers through said passageway.

2. A control device for fluid circulating systems comprising a valvebody providing an inlet chamber, an outlet chamber, a return chamber,and a separate fluid connection to each of said chambers, acommunicating passageway in the valve body connecting the inlet and theoutlet chambers, a valve having an extension slidable in the returnchamber and adapted to open and close the communication between thechambers, a resisting means acting upon said valve to close thecommunication between said chambers, the presing a'pump, a valve bodyhaving an inlet chamber, an outlet chamber, and a return chamber, aconnection from the inlet chamber to a source of supply, a connectionfrom the outlet chamber to the pump inlet, said pump having a discharge'line provided with a by-pass connected to the return chamber, a port insaid valve body connecting the inlet and outletchambers, a valve adaptedtoseat across said port, said valve having an extension slidable in thereturn chamber and provided with a passageway connecting the inlet andreturn chamber, and resilient means acting to hold the valve on its seatand to blank 01! said passageway against the wall of the return chamber,the pressure in the pump by-pass acting in the-return chamber againstthe valve extension to move the valve irom its seat, whereby fluid maypass from the source of supply through the valve body to the pump, andfrom the by-pass through the return chamber and the valve pas- 4. Aiiluidv circulating system comprising a pump, a valve body having aninlet chamber, an

outlet chamber, and'a return chamber, a connection from the inletchamber to a source of fluid supply, a connection from the outletchamber to the pump inlet, said pump having a discharge line providedwith a by-pass connected to the return chamber, acommunicating'passageway in the valve body connecting the inlet and the outletchambers, a valve having an extension in sliding

